Route Reliability
Boise → Denver
BOI–DEN · 649 miles · Boise Airport to Denver International Airport
- 81%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 0.2%
- Cancelled
- 3,036
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%1,817 flights
- 2.Southwest Airlines79%1,097 flights
- 3.Frontier Airlines75%122 flights
What the data says
Morning flights do better here.
BOI–DEN flights departing between 3–6 AM arrived on time 94% of the time, versus 61% between 3–6 PM.
Friday is doing you no favors.
BOI–DEN flights arrived on time 88% of the time on Saturdays. On Fridays: 74%.
United Airlines runs this route best.
United Airlines arrived on time 83% of the time on this route; Frontier Airlines managed 75%.
It basically never cancels.
Out of 3,036 scheduled flights, only 0.2% were cancelled.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon83%(422 flights)
- Tue83%(413 flights)
- Wed86%(415 flights)
- Thu78%(451 flights)
- Fri74%(430 flights)
- Sat88%(404 flights)
- Sun79%(486 flights)
- 3–6 AM94%(475 flights)
- 6–9 AM92%(566 flights)
- 9 AM–12 PM88%(682 flights)
- 12–3 PM76%(659 flights)
- 3–6 PM61%(638 flights)
- 6–9 PM—(1 flights)
Jun 71% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 252 |
| July 2025 | 71% | 257 |
| August 2025 | 74% | 255 |
| September 2025 | 82% | 249 |
| October 2025 | 83% | 259 |
| November 2025 | 86% | 245 |
| December 2025 | 86% | 257 |
| January 2026 | 91% | 255 |
| February 2026 | 83% | 233 |
| March 2026 | 86% | 252 |
| April 2026 | 84% | 248 |
| May 2026 | 80% | 259 |
Keep nerding
Based on 3,036 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.